Perhaps you should try some spelling variations:
"modified objective optimization algorithmssss" » "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective optimization algorithmsssss", "modified objective optimisation algorithmssss", "modified objective estimation algorithmssss", "modified multiobjective optimization algorithmssss"
"defined network optimization algorithm" » "defined network optimization algorithms", "defined network optimisation algorithm", "defined network estimation algorithm", "designed network optimization algorithm"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("defined network optimization algorithm") OR ("modified objective optimization algorithmssss"))~.
• Removing quotes may allow a broader search: (( defined network optimization algorithm ) or ( modified objective optimization algorithmssss ))~.
• Adding a wildcard symbol may retrieve word variants: (("defined network optimization algorithm") or ("modified objective optimization algorithmssss"))*.